International Society of Science and Applied Technologies |
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Construction of Process Quality Assessment Model for Ratchet Torque Wrench | ||||
Author | Chun-Min Yu
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Co-Author(s) | Tsang-Chuan Chang; Kuen-Suan Chen; Huo-Tsan Chang
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Abstract | This paper conducts a case study on ratchet torque wrenches and develops an assessment and verification model of process quality as a means of assisting hand tool manufacturers in managing the quality of ratchet torque wrench products and promoting the on-going development in the hand tool industry. We first propose the process quality index (PQI) that can directly determine a precise level of quality based on the relationship between various process capability indices and Six Sigma quality levels. Using inference, we further develop a testing model of PQI to evaluate the quality level reached of process performance. The present case study is investigated to illustrate the practical applicability of the proposed method.
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Keywords | Hand tools, ratchet torque wrench, process quality index, quality level, statistical inference | |||
Article #: 22022 |
August 4-6, 2016 - Los Angeles, California, U.S.A. |